In one embodiment, the apparatus includes a decoder. The golf club head has a body member and a face insert formed of different materials. The center section is disposed adjacently to the differential unit and one of the axles. A method of producing a metal-chalcogenide photovoltaic device includes providing a photovoltaic substructure, providing a solution of metal-oxide nanoparticles, and forming a window layer on the substructure using the solution of metal-oxide nanoparticles such that the window layer includes a layer of metal-oxide nanoparticles formed by a solution process. The sensory material receives at least a portion of the excitation emitted by the electromagnetic source. Then, the dielectric layer formed on the bonding area is removed to expose the bonding electrode.